TTi Laboratory Power Supply Products

 TSX-P Series - Description and Specifications

TSX-P Series - 350W/360W Single Output

  High power 35V/10A & 18V/20A
  Very low noise, excellent transient response
  RS-232 and GPIB interfaces as standard
  Keyboard setting of all parameters
  Rotary and delta (step) control of V and I
  Watts display, non-volatile storage of 25 settings
  Fully programmable with bus readback of V & I

 

Standard versions

    Larger Image
 Model Range:  TSX1820P - 18V/20A,  TSX3510P - 35V/10A

OVERVIEW

The Thurlby-Thandar TSX series represents the state of the art in high output PSU design.
A wide range of voltage-current output combinations will become available with power levels of 360 Watts and more.
Each output combination is available in two versions: with conventional analogue controls (TSX) and with programmable controls (TSX-P).

The P versions

The TSX-P versions represent a major step forward in PSU design.
They combine a wealth of “ease of use” orientated keyboard functions with full remote programmability. The result is the most comprehensive and versatile PSU control system available anywhere.



Linear post regulation for unrivalled performance

The heart of all TSX series PSUs is an innovative regulator design which combines switch mode pre-regulation with linear post-regulation.
The pre-regulator uses specially developed techniques to dramatically reduce the capacitance between input and output thus eliminating the high levels of common-mode noise normally associated with switch mode PSUs.
The linear post-regulator combines very low levels of output noise with excellent load regulation and transient response. The result is performance comparable with a pure linear design.

Compact and lightweight

The hybrid regulator design provides a PSU which is both smaller and lighter than competitive products.
The high thermal efficiency also means that the PSUs are silent in operation since fan cooling is unnecessary.

Constant voltage or constant current operation

All TSX series PSUs can operate in both constant voltage and constant current modes with automatic crossover and automatic mode indication.

High accuracy metering

All versions incorporate high resolution digital meters for both voltage and current.
V and I levels can be set to high accuracy prior to connection to the load and the limit settings can be checked at any time.
A damping switch for the current meter enables the average value of rapidly changing currents to be read.

Full overvoltage protection

All versions incorporate a fully variable OVP trip to protect against regulator failure.
The output is fully protected and other protection functions include regulator overtemperature, and sense miswiring.

Bench or rack mounting

The attractively styled casing takes up very little bench space and incorporates a tilt bail to angle the front panel when required.
The case is half rack width (3U height), an optional rack-mount kit is available.
Output terminals are fitted at both front and rear.
* Note that in rack environments with limited ventilation fan cooling may become necessary.

A third display for clarity & safety

To provide additional data and to avoid any possibility of ambiguity or error an auxiliary display is incorporated. All keyboard entries appear on this display for inspection before they are actioned by pressing the “confirm” key.
This failsafe system avoids such possibilities as setting 25 Volts instead of 2.5 Volts as could occur on other less carefully designed systems. The auxiliary display is also used to set and display a variety of information.

Keyboard or quasi-analogue control

Voltage and current levels can be entered directly from the keypad to a resolution of 10mV or 10mA giving unparalleled speed and precision.
Alternatively a rotary control can be used to set voltage or current in a manner simulating a conventional analogue control.

Watts display for added convenience

When not being used for other purposes the auxiliary display shows the output power in Watts (Volts x Amps).

Delta-mode control

Voltages and currents can be stepped up and down by a fixed increment set from the keyboard. This facility is invaluable for repetitive testing where, for example, the effect of 1% changes in voltage need to be observed. The delta increment is clearly shown on the auxiliary display.

Non-volatile storage of multiple settings

25 non-volatile memories are provided for storing frequently used settings. Each store holds a voltage, current and OVP setting.
This facility is particularly useful in repetitive testing situations within production, development or inspection areas.

Full bus control, GPIB & RS232

The P versions incorporate both GPIB (conforming to IEEE-488.1 & .2) and addressable RS232 (ARC) interfaces as standard.
The ARC system allows up to 32 instruments to be “daisy-chained” together and to be individually addressed and controlled using a single RS232 port on a computer. Bus controlled functions include set voltage, set current, set OVP, set output on/off, read voltage, read current.

SPECIFICATIONS  

Output Specifications:

Operating modes:

Constant voltage or constant current with automatic crossover.

Voltage range:

0V to 35V (TSX3510P).

 

0V to 18V (TSX1820P).

Current range:

0A to 10A (TSX3510P).

 

0A to 20A (TSX1820P).

Overvoltage protection:

10% to 110% of max. output voltage.

Setting resolution:

10mV, 10mA.

Load regulation:

<0.01% of max. O/P for 90% change.

Line regulation:

<0.01% of max. O/P for 10% change.

Output impedance:

<1mW in constant voltage mode.

 

>5kW in constant current mode.

Ripple & noise:

<1mV RMS typical in constant voltage.

 

<3mA RMS typical in constant current.

HF common mode noise:

Typically <3mV RMS, <10mV pk.

Transient load response:

<20us to within 50mV of set level for 90% load change.

Temperature coefficient:

typically <100ppm/oC.

Overvoltage protection delay:

<200us.

Protection functions:

Overvoltage trip, Regulator over temperature, Sense miswiring.

Status indication:

Output on/off lamp, Constant voltage mode lamp, Constant current mode lamp, Trip message.

Output switch:

Electronic.

Output terminals:

4mm output terminals at front, screw terminals for output and sense at rear.

Output protection:

Full forward and reverse protection via OVP and diode clamp.

Input Specifications:

Input voltage range:

180V to 270V RMS, 90V to 135V RMS, 47 to 63Hz.

Power requirement:

750VA max.

Voltage range selection:

Rear panel slide switch.

Meter Specifications

Meter types:

Separate 4 digit meters for voltage and current with 12.5mm (0.5") LED displays.

Meter resolutions:

10mV, 10mA.

Meter accuracies:

Voltage ±(0.2% + 1 digit)

 

Current ±(0.5% + 1 digit).

Mechanical & Environmental

Electrical safety:

Complies with EN61010-1.

EMC:

Complies with EN50081-1 and EN50082-1.

Temperature:

+5oC to +40oC operating, 20% to 80% RH, -40oC to +70oC storage.

Size:

210 x 130 x 350mm (WxHxD)

 

(half rack width x 3U height), optional rack mounting kit available.

Weight:

5.0kg (TSX versions).

 

5.5kg (TSX-P versions).

Front Panel Controls

Voltage setting:

Direct keyboard entry or quasi-analogue rotary control.

Current setting:

Direct keyboard entry or quasi-analogue rotary control.

Overvoltage setting:

Direct keyboard entry.

Output On/Off:

Push button with dual indicator lamps.

Note: all voltage and current levels set via the keyboard are displayed on a separate 0.3" 4 digit display. This entry preview system ensures that the user can observe the value entered before it is effected thus avoiding possible error. The display is also used for setting additional functions and for displaying watts.

Additional Keyboard Functions:

Increase or decrease voltage or current in user-selectable steps (delta mode).
Store/recall voltage, current & OVP levels from non-volatile memory (25 memories).
Set digital interface type (RS232 or GPIB), set baud rate, set address.

Digital Interfaces 

RS232:

Variable baud rate, 9600 baud maximum, 9 pin D connector (male). Fully compatible with standard RS232 or TTi addressable RS232 system (ARC).

IEEE-488 (GPIB):

Conforming with IEEE488.1 & IEEE488.2.

Operational functions:

Set voltage; set current; set OVP; set output On/Off; read output voltage/current.

Setting resolution:

Voltage - 10mV; Current - 10mA.

Setting accuracy:

Voltage - ±(0.1% + 10mV);

 

Current - ±(0.2% + 20mA).

Response times:

Interface - <15ms (single command); PSU - Depends on Load conditions, typically 150ms to within 0.1% of final value (except for voltage reduction with low load current which will be longer).

Readback resolution:

Voltage - 10mV

 

Current - 10mA.

Readback accuracy:

Voltage - ±(0.1% + 1 digit);

 

Current - ±(0.5% +1 digit).

Operating software:

Software for operating the PSUs under GPIB or RS232 control is available including a Labwindows* driver and ARC-TALK software for a PC.
 Thurlby Thandar Instruments Ltd. operates a policy of continuous development and reserves the right to alter specifications 
  without prior notice.

Thurlby Thandar Instruments Limited
Glebe Road, Huntingdon, Cambridgeshire PE29 7DR
Tel: 01480 412451  Fax: 01480 450409  Web: www.tti.co.uk  Email: sales@tti.co.uk